Grinder.



F. H. LINDNER.

GRINDER.

APPLICATION FILED APR.5,1914.

1,182,196. Pa ented Mar 16, 1915.

WITNESSES; INVENTORI fi dull BY 1: d}

ATTORNEK Specification of hettera l atent.

Fatented 1G3, llh lli h matite. filed a e iota. email-i0.

To all whom it may GOflCWt ticatiuin,

The-invention relates'to grinding apparatus, more particularly to a grinding tool for the of an internal cylindrical surface.

.lt'has let its object a tool of this characwhich maybe readily attachable to a 'spindle, for example, for operation on a lathe. of usual construction; or, which may he employed as a unit provided with its own driving means for direct attachment to the object to he ground.

The invention has for its object, furthermore, to enable the tool to he readily iusted to the grinding of internal cylindrical surfaces of various diameters.

The nature of the invention will he best I understood when described in connection with the accompanying in which- Figure l is a part longitudinal seetion of the tool, and cylinderto be ground therehy, as attached to a lathe. Fig. 2 is a transverse section taken on the line (21-15, Fig. l, Fig. 3 is a transverse section taken on the line :t-e, t. Fig. 4: is an-elevation, partly in section, illustrating a modification,

Similar characters of reference designatw corresponding parts throughout the several news I Referring to the drawings, 1 designates a "face plate which is secured by means of its sleeve to a spindle 2 of a lathe, of which only the head 3 and said spindle are shown.

drawin s,

The spindle may be rotated in the usual manner by a suitable motor or the like (not shown). A. shaft 4 passes through the said spindle and is mounted in suitable bearings therein and in the -lace plate 1, and is provided with a driving wheel 5. The latter may be connected with the driving mecha: nism provided for spindle 2;, or, may he rotated by suitable means (not shown) independently of the said spindle.

To the face plate l is secured a casing 6 having a cover 7 which may be integral therewith; or, the casing 6 may he made integral with the :iace plate 1 and the cover '7 made removable, if desired, the whole constituting a suitable housing for the transuussion mechanism between the driving shaft 4: and a driven shaft 13. To the cover '4' is pivotally attached, as upon an intermediate shaft 15 mounted in the face plate It and cover '3', a carrier member 8 for a quill 9 which. carries the driven shaft 13 and Whose outer end is secured a grinding wheel 14;, i

vPower is transmitted from the shaft 4 the shaft 13 through a gear wheel secured to the inner end of the former and through two gear wheels ll and Ill fixedly secured to each other, or integral, and mounted to retats upon the intermediate shaft 15 which is mounted in said casing and cover. Gear wheel ll meshes with a gear wheel 12 fixed to the inner end of the driven shaft 13, md which shalt passes through an arcuate slot l2 of the cover 7., The said gear wheel, shaft and quill may thus he swung about the intermediate shaft l5 as an axis to afiord thereby a planetary movement of the said shaft 13 and its grinder llabout the intermediate shait 15,.

A locking bolt 16 is arranged to pass through a second arcuate slot 1? of cover 7; and'loy means of its head 18 and a nut 19, is adapted to secure the carrier 8 to the cover 7 in any position selected and resulting from the planetary movement aforesaid,

/ 'lhe grinding wheel, through the said planetary motion, may thus be adjusted for grinding the internal surfaces of hollow cylinders of various diameters, the degree of adjustment depending upon the length of the planetary radii, degree of planetary positiouangle between a line through the axis of the intermediate shaft 15 and the axis of thedriv-ing shaft 4: and a line, through the I axes of the shafts l5 and 13, and upon the diameter of the grinding wheel 14. The grinding wheel may,therefore, he used substantially to its full capacity in that as it wears down the shaft 13 may be planetarily swung compensate for its diminished diameter. The degree of the planetary posi tion is arranged to be adjusted by means of a nut 20 working on a threaded rod 21 secured to the cover 'lythe said out being held between downwardly extending lingers $22 of the carrier plate 8. It is understood, oi course, thatspindle 2 rotates the entire housins and with it the quill 9; and that the cylinder or similar object to be ground is to he till fedrelatively to the said grinding wheel 14 V by means (not shown) generally provided on a lathe in connection with its feed screw (not shown).

' In Fig. 4, the grinder is shown as a com- -plete unit, provided with suitable driving mechanism, and is adapted to receive the object to be ground. To. this end, the spindle 2 is arranged to be held in a hub A concentrically to the internal cylindrical surface of the object which is "suitably supported in arms or clamps R extending from the said hub. Spindle 2 is provided-with a thread matching that of the hub A and carries a worm wheel N meshing with a worm M, the latter being on a shaft L driven through gears K. and J and the 'latter of which is mounted upon shaft I driven through bevel gears F and H. Gear wheel F is mounted upon the shaft D of a drivin motor B, said shaft D driving also a beve gear wheelE in mesh with a bevel gear wheel G' secured to the driving shaft 4 and which passes through the spindle 2. The

2 motor B is suspended from a bearin spindle 2 by hangers C, C. The

shaft 4 is connected with the driven shaft 13 to drive the-grinding wheel 14, as hereinbefore described; and the revolution of motor shaftD will rotate driving shaft 4 and simultaneously therewith the indle 2, the former eifectin the rotation o the grinding wheel 14 and the latter causin the same to be fed through the cylinder'to e ground.

1". Ingrinding apparatus: a driving shaft, and means to rotate the same; a driven shaft, and a grinding wheel secured thereon; means to revolve the driven 'shaft'about an axis fixed relativelyto the driving shaft;

40 and planetary means for adjusting the length of the radius between the said shafts.

2. In grinding apparatus: a driving shaft, and means tofrotate the same; a rotatable housing mounted thereon; a driven shaft mounted in said housing, and a grinding wheel secured thereon; means retained and supported by said housing to transmit ro-g. tation from the said driving shaft to the,

said driven shaft; and means for varying, the axial relation between said shafts.

3. In grinding apparatusz-a driving shaft in fixed position, and means to rotate the same; an intermediate shaft relatively fixed with respect'to said driving shaft; a driven shaft, and a grinding wheel secured thereon; and transmission mechanism intermediate of said driving and driven shafts and affording a planetary movement of the latter about the said intermediate shaft.

spindle, a housing secured thereto, a driving shaft passing through the spindle and into the housing, a gear wheel secured to the inher and 'of said drivin shaft, a driven shaft extending from said ousing, a gear wheel riving secured to the inner en'd of driven; shaft and a grinding wheel secured to its.outer end, an intermediate shaft mounted in said housing, -garwheels rotatable with one another and rotatably mounted on saidintermediate shaft, one of said gear wheels being in mesh with the said gear wheel on the driving shaftland 1 the other mesh with'the' said gear wheelon the driven shaft, a connecting member from and about the intermediate shaft to and aboutthe driven shaft aflording a planetary movement of the said driving shaft gear wheel and its driven shaft on and about the said gear wheel on the intermediate shaft. 3

5. In grinding apparatus: a rotatable spindle, aface plate secured thereto, 9; casing secured to said face plate, adriving shaft, an intermediate shaft mounted in said casing, a carrierpivbted-thereon," a quill in- 5 tegral with said carrier, a'driven shaft concentric with said quill, a grinding wheel secured to said driven shaft, transmission means intermediate of said driving and driven shafts, andmea'ns to secure said carrier in a selected position to said casing.

6. In grinding apparatus: a rotatable spindle, a faceplate secured thereto, a casing secured to said face plate, a driving shaft passing through said spindle,an intermediate shaft mounted in said casing, a carrier pivoted thereon, a quill integral with said carrier, a driven shaft concentric'with said quill, a grinding wheel secured to said driven shaft, transmission means intermediate of said driving and driven shafts, means for locking the carrier to the said casing'and including a locking bolt adapted to pass through an arcuate slot of the casing, a head on said locking bolt adapted to bear against the casing, and anut on said locking bolt to bear'against said carrier. 1

7; In grinding apparatus: a rotatable spindle, a face plate secured thereto, a casing secured to said face plate,-a driven shaft, in-intermediate shaft mounted in said casing, a carrier pivoted thereon, a quill integral with said carrier, a driven'shaft concentric with said quill, a grinding wheel secured to said driven shaft, transmission means intermediate of said driving and driven shafts, means to secure said carrier in a selected position to said casing, and means to adjust said carrier relatively to said casing. 120

8. In grindin apparatus:. a rotatable spindle, a face p ate'secured thereto, a casing secured to said face plate, a driving Qli 4 shaft passing through said spindle, a casing 4. In grinding apparatus: a rotatable secured to said face plate, an intermediate shaft mounted in said casing, a carrier pivoted thereon, a quill integral with said carrier, a driven shaft concentric with. said quill, a grinding wheel secured to said driven shaft, transmission means intermedi- 130 ate of said driving and driven shafts, means the cover, and a nut thereon between said for locking the carrier to the said casing fingers. and including a locking bolt adapted to pass Signed at Newark, in the county of Union, through an arcuate slot of the casing, a head and State of New Jersey, this 21st day of 5 on said locking bolt adapted to bear against April, A. D. 1914.

the easing a nut on said locking belt to hear FRANK H. LINDNER. against said eairier, and means to ad ust said carrier relatively to said casing and Witnesses: comprising fingers extending downwardly FREDK T. Souvnrz,

10 from said carrier, a threaded rod secured to FRED SWEET. 

